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Securities, at Fair Value (Tables)
 9 Months Ended
Sep. 30, 2025
Investments, Debt and Equity Securities [Abstract]  
Schedule of Agency MBS Portfolio
The following table presents certain information regarding the composition of the Company’s Agency MBS portfolio:
September 30, 2025
(Dollars in Thousands)Current FaceWeighted Average Purchase PriceWeighted Average Market PriceFair ValueWeighted Average Loan Age (Months)
CPR (1)
30-Year Fixed Rate:  
5.00% Coupon
$258,145 99.0 %99.4 %$256,693 138.3 %
5.50% Coupon
1,599,791 99.8 %101.1 %1,617,666 126.8 %
6.00% Coupon
288,323 100.1 %102.5 %295,617 238.4 %
6.50% Coupon
5,838 101.0 %103.7 %6,055 22— %
  Total$2,152,097 99.8 %101.1 %$2,176,032 147.1 %
December 31, 2024
(Dollars in Thousands)Current FaceWeighted Average Purchase PriceWeighted Average Market PriceFair ValueWeighted Average Loan Age (Months)
CPR (1)
30-Year Fixed Rate:  
5.00% Coupon
$71,645 100.2 %96.6 %$69,233 213.3 %
5.50% Coupon
993,466 100.2 %98.8 %981,796 98.2 %
6.00% Coupon
313,173 100.1 %100.7 %315,317 1411.5 %
6.50% Coupon
25,607 100.4 %102.7 %26,289 1536.1 %
  Total$1,403,891 100.2 %99.2 %$1,392,635 119.2 %
(1) Reflects the average of the one month CPR for the number of months the security was held during the most recent three month period.
Schedule of Information about MBS and CRT Securities
The following tables present certain information about the Company’s Agency MBS and other Securities:
 
September 30, 2025
(In Thousands)Principal/Current FacePurchase PremiumsAccretable Purchase Discounts
Discount Designated as Credit Reserve (1)
Gross Amortized CostGross Unrealized GainsGross Unrealized LossesNet Unrealized Gain/(Loss)Fair Value
Agency MBS$2,152,097 $6,556 $(11,539)$— $2,147,114 $29,882 $(964)$28,918 $2,176,032 
Other Securities (2)(3)(4)
85,185 3,420 (5,138)(7,191)76,276 7,496 (147)7,349 83,625 
Total residential mortgage securities (2)(3)(4)
$2,237,282 $9,976 $(16,677)$(7,191)$2,223,390 $37,378 $(1,111)$36,267 $2,259,657 

December 31, 2024
(In Thousands)Principal/Current FacePurchase PremiumsAccretable Purchase Discounts
Discount Designated as Credit Reserve (1)
Gross Amortized CostGross Unrealized GainsGross Unrealized LossesNet Unrealized Gain/(Loss)Fair Value
Agency MBS$1,403,891 $5,534 $(3,525)$— $1,405,900 $2,318 $(15,583)$(13,265)$1,392,635 
Other Securities (2)(3)(4)
146,808 14,747 (5,662)(23,691)132,202 13,166 (490)12,676 144,878 
Total residential mortgage securities (2)(3)(4)
$1,550,699 $20,281 $(9,187)$(23,691)$1,538,102 $15,484 $(16,073)$(589)$1,537,513 
(1)Discount designated as Credit Reserve is generally not expected to be accreted into interest income.
(2)Based on management’s current estimates of future principal cash flows expected to be received.
(3)Amounts disclosed at September 30, 2025 includes CRT securities with a fair value of $47.8 million for which the fair value option has been elected. Such securities had approximately $2.5 million gross unrealized gains and no gross unrealized losses at September 30, 2025. Amounts disclosed at December 31, 2024 include CRT securities with a fair value of $51.5 million for which the fair value option has been elected. Such securities had gross unrealized gains of approximately $3.2 million and no gross unrealized losses at December 31, 2024.
(4)Amounts disclosed at September 30, 2025 include Non-Agency MBS with a fair value of $22.4 million for which the fair value option has been elected. Such securities had approximately $0.7 million gross unrealized gains and $0.1 million gross unrealized losses at September 30, 2025. Amounts disclosed at December 31, 2024 include Non-Agency MBS with a fair value of $22.6 million for which the fair value option has been elected. Such securities had $0.5 million gross unrealized gains and $0.5 million gross unrealized losses at December 31, 2024.
Schedule of Impairment and Other Net (Loss)/Gain on Securities and Other Portfolio Investments
The following table presents the components of Impairment and other net gain/(loss) on securities and other portfolio investments, which is presented in Other Income/(Loss), net in the consolidated statements of operations:

Three Months Ended
September 30,		Nine Months Ended
September 30,
 (In Thousands)2025202420252024
Net unrealized gain/(loss) on securities$17,798 $16,890 $42,006 $9,591 
Net realized gain/(loss) from the sale of securities668 7,324 902 9,992 
Impairment of securities— — — — 
Total Impairment and other net gain/(loss) on securities18,466 24,214 42,908 19,583 
Net unrealized gain/(loss) on other portfolio investments(488)(1,286)2,901 (4,273)
Net realized gain/(loss) on other portfolio investments26 — 19 — 
Total Impairment and other net gain/(loss) on securities and other portfolio investments$18,004 $22,928 $45,828 $15,310 
Schedule of Impact of AFS on AOCI
The following table presents the impact of the Company’s AFS securities (whose changes in fair value are recorded through OCI) on its AOCI:
Three Months Ended
September 30,		Nine Months Ended
September 30,
(In Thousands)2025202420252024
AOCI from AFS securities:    
Unrealized gain on AFS securities at beginning of period$4,889 $17,652 $9,476 $17,698 
Unrealized gain/(loss) on securities available-for-sale32 (202)(4,329)2,410 
Reclassification adjustment for MBS sales included in net income(594)(7,328)(820)(9,986)
Change in AOCI from AFS securities(562)(7,530)(5,149)(7,576)
Balance at end of period$4,327 $10,122 $4,327 $10,122 
Schedule of Interest Income on MBS, CRT Securities and MSR Related Assets
The following table presents the components of interest income on the Company’s Securities, at fair value: 
 Three Months Ended
September 30,		Nine Months Ended
September 30,
(In Thousands)2025202420252024
Agency MBS
Coupon interest$25,596 $10,967 $69,372 $27,379 
Effective yield adjustment (1)(2)
44 (28)105 (80)
Interest income$25,640 $10,939 $69,477 $27,299 
Other MBS
Coupon interest$1,420 $2,009 $4,383 $6,170 
Effective yield adjustment (1)(2)
648 13 1,146 87 
Interest income$2,068 $2,022 $5,529 $6,257 
Term notes backed by MSR collateral
Coupon interest$— $1,265 $1,789 $5,026 
Effective yield adjustment (2) (3)
— 516 4,361 2,781 
Interest income$— $1,781 $6,150 $7,807 
(1)Includes amortization of premium paid net of accretion of purchase discount.  Interest income is recorded at an effective yield, which reflects net premium amortization/accretion based on actual prepayment activity.
(2)The effective yield adjustment is the difference between the net income calculated using the net yield less the current coupon yield. The net yield may be based on management’s estimates of the amount and timing of future cash flows or in the instrument’s contractual cash flows, depending on the relevant accounting standards.
(3)The effective yield adjustment for the nine months ended September 30, 2025 includes $2.6 million of accelerated discount accretion for MSR-related assets that were repaid in full during the second quarter.